#include <bits/stdc++.h>
using namespace std;
const double pi = 3.1415926;
int main() {
	double r;
	double d, s, c;
	cin >> r;
	d = r * 2;
	s = pi * r * r;
	c =  r * 2 * pi;
	printf("%.4lf %.4lf %.4lf", d, c, s);
	return 0;
}